Plants with zinc deficiency show reduced biosynthesis of ___________.
Auxin (indole-3-acetic acid).
Zinc is an essential micronutrient for plants and plays several critical roles in their growth and development: Zinc deficiency in plants is a common micronutrient problem that impacts their growth, development, and overall productivity. The symptoms include yellowing between the veins of leaves (interveinal chlorosis), reduced growth, and the appearance of small or misshapen leaves.